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EP2583995B1 - Résine à couler contenant une charge métallique pour la fabrication de moulages poreux. - Google Patents

Résine à couler contenant une charge métallique pour la fabrication de moulages poreux. Download PDF

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Publication number
EP2583995B1
EP2583995B1 EP11185922.9A EP11185922A EP2583995B1 EP 2583995 B1 EP2583995 B1 EP 2583995B1 EP 11185922 A EP11185922 A EP 11185922A EP 2583995 B1 EP2583995 B1 EP 2583995B1
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EP
European Patent Office
Prior art keywords
weight
resin
composition according
porous
water
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EP11185922.9A
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German (de)
English (en)
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EP2583995A1 (fr
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Ulrich Hüther
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical

Definitions

  • the invention relates to a composition and a method for producing a porous, resin-bonded molding, plates and blocks and the molding itself or the plates and blocks for use in mold making for various applications such as the ceramic industry, Vakuumtiefziehclar, the filter industry, suction and devices, for example, on conveyor belts.
  • Gypsum molds have a pore diameter of 2.3 to 2.5 microns and a pore content of about 50 vol .-%. Per plaster mold can be made about 30 to 100 parts. By contrast, several thousand parts can be manufactured in the plastic molds of the prior art. The inventor G. Will speaks of 2000 to 3000 possible impressions (see DE1808391 ). However, the shapes are poor in pore size and porosity. For most commercial resins, the pore diameter is even greater than 20 microns. This leads to rougher surfaces in the finished ceramic parts.
  • the company Sacmi gives an average pore diameter of 5 to 7 ⁇ m in an information brochure (www.sacmi.com/System00/00/96/9671/633540644617343150_1.pdf) for its porous molding material "Sacmi Por".
  • the Applicant is aware that the actual pore sizes in sacmiforms are generally only between 8 and 10 ⁇ m.
  • the mold material of the Sacmi Group is the market leader in terms of pore size. For the porosity of the material 27 to 37% and for the compressive strength 30 N / mm 2 are given.
  • Sacmi The special feature of Sacmi is that the mold material is not commercially available as a resin mixture, ie it can be ordered only finished production forms for the ceramics industry, which are manufactured by Sacmi. Obviously, the "know-how" in terms of materials and process engineering should be protected in this way. The waiting time of the customer of 2 to 3 months for such a Sacmi form and a disproportionately high price makes clear the great demand for a mold material with pores ⁇ 10 ⁇ m.
  • microporous materials are also on the market as block products.
  • An example of this is METAPOR®, a microporous, air-permeable material for mold making based on EP resin (10-35%) and aluminum powder (65-90%). These are plates and blocks, which are produced by pressing.
  • METAPOR® is available in 500 x 500 mm blocks with different thicknesses (10 - 420 mm) and in different types.
  • a new development of the company Portec is the METAPOR ProtoBlock WHITE®, which is manufactured on the basis of aluminum hydroxide.
  • METAPOR® is processed by machining. Examples are shown in the following table: material Average pore diameter porosity METAPOR BF-100 AL approx. 15 ⁇ m about 15% METAPOR CE-100 AL approx. 10 ⁇ m about 20% METAPOR MC-100 AL about 400 microns about 26% METAPOR HD-210 AL approx. 12 ⁇ m about 16% METAPOR HD-100 AL - - METAPOR ProtoBlock WHITE approx. 12 ⁇ m -
  • ESPOR® is used to make tools for thermoforming, vacuum forming, vacuum fixation and air cushioning.
  • ESPOR® is used to make molds.
  • the fillers include: gelatin, alginic acid, cellulose ether, colloidal silica, kieselguhr or water-soluble colloids, for example, polyacid; Hollow glass microspheres, carbon black, graphite, chalk, gypsum, cement, alumina, aluminum hydroxide, kaolin, phosphates, ammonium polyphosphate, montmorillonite, expanded minerals, polystyrene or polyurethane foam particles ... (see GB879207 ; CH386694 ; DE29806606U1 ). However, the properties of the products produced are determined by the fillers.
  • US 2010/307665 A1 describes reactors for the production of foams. This document discloses a process for producing polymer foam wherein a high internal phase emulsion (HIPE) comprising an aqueous phase and an oil phase is cured.
  • HIPE high internal phase emulsion
  • the oil phase contains conductive particles such as metal powder or metal flakes.
  • US 6,067,430 A describes a fluorinated foam material that can be charged. This document discloses a filled polymeric foam having a pore diameter of 1 to 9 ⁇ m. Metal powder is mentioned as a filler.
  • AT307752 Will describes the emulsion polymerization with aftertreatment in a steam atmosphere to avoid uncontrolled shrinkage.
  • the Will patents disclose that, for the formation of an open pore system, it is necessary to open the aqueous phase before or during the polymerization. Due to the very fine distribution of the pore-forming agent and the polymerization shrinkage of the organic phase occurs when opening the aqueous phase, however, a phase change, under the action of a coarse sponge-like solid product is formed with large cavities, or it even forms a powdered to fine-grained solid polymer. With DE1928026 Will seeks, under certain conditions, to control the opening of the aqueous phase so as not to form a solid polymer consisting of fine particles, but to maintain the continuity of the polymeric phase without disturbing the distribution of the water in the oil phase as dictated by the emulsion becomes.
  • the "opening of the aqueous phase" is to be understood as going from the disperse to the co-continuous state.
  • there are two continuous phases at the end of curing, there are two continuous phases: a continuous plastic phase and a continuous water phase.
  • AT329881 Will describes the relationship between the cell structure and the viscosity of the emulsion.
  • a determination of the type of the resulting polymer in advance is possible.
  • the degree of dispersion can be measured and tracked by conductances such as viscosity, electrical conductivity, emulsion turbidity or similar physical quantities.
  • curable plastic binders with granular fillers eg, hollow glass microspheres or quartz powder
  • the binders used are polymerizable resin systems, for example polyester resin systems, epoxy resin systems, phenolic resins and furan resins, and (meth) acrylate resin systems (cf. DE29806606U1 or CH490960A ).
  • a known technique for processing casting resins is, for example, the foaming of a filled with filler form with reaction foams of polyurethane or phenolic resin ( DE1704853 ).
  • the molds are evacuated and in addition the centrifugal force is utilized.
  • a fine-grained filler for example, hollow glass microspheres
  • a low-viscosity resin such as an epoxy resin or a polyester resin
  • the mold is filled with the filler in an evacuated space and then overlaid with the liquid resin and centrifuged.
  • the resin penetrates with simultaneous venting into the empty spaces formed by the filler and forms after curing a largely bubble-free, lightweight material ( EP0151461 ).
  • US4346149 describes a composition containing acrylic resin, water and aluminum powder.
  • the aim of this document is to avoid pores when filling with resins with metallic fillers, which is why an antifoaming agent is attached.
  • the aluminum powder accounts for less than 10% by weight of the composition.
  • the product described is a paint that should be particularly free of pores.
  • DE4104295A1 describes a composition containing acrylic resin, water and non-metallic filler for the manufacture of kitchen worktops.
  • WO2009015788A2 describes a metallic paint for automobiles and a composition containing water, film-forming agent and aluminum effect pigment.
  • the object of the present invention is to provide a moldable composition for producing a plastic mold or a molded part, block or plate, which has an improved thermal conductivity and Nevertheless, it has a high porosity with small pore diameters.
  • the composition contains at least 150, in particular at least 300 parts by weight of metal particles.
  • the composition according to the invention contains 115 to 160 parts by weight of the resin mixture. Regardless of or in combination therewith, the composition according to the invention advantageously contains from 120 to 170 parts by weight of the water component. Regardless of or in combination therewith, the composition according to the invention advantageously contains from 400 to 550 parts by weight of metal particles. Regardless of or in combination therewith, the composition according to the invention advantageously contains from 5 to 10 parts by weight of radical initiator.
  • any polymerizable or otherwise curable and water-emulsifiable liquid substances are suitable as constituents for the resin mixture according to the invention.
  • These monomers may contain at least one olefinic double bond in the molecule.
  • Such compounds may be, for example, those having attached to an aromatic nucleus vinyl or ⁇ -alkylvinyl groups, such as for example styrene, divinylbenzene, trivinylbenzene, methylstyrenes, ⁇ -methylstyrene.
  • esters and ethers of vinyl alcohol such as vinyl acetate, divinyl phthalate, divinyl maleate, vinyl butyl ether, divinyl ethane diol ethers, and esters of acrylic or methacrylic acid, such as ethyl acrylate, 1,2-propanediol diacrylate, methyl methacrylate, ethyl methacrylate, ethanediol methacrylate, Butene-2-diol-1,4-dimethacrylate, cyclohexyl methacrylate or maleinates such as diethyl maleate and fumaric acid esters.
  • esters and ethers of vinyl alcohol such as vinyl acetate, divinyl phthalate, divinyl maleate, vinyl butyl ether, divinyl ethane diol ethers
  • esters of acrylic or methacrylic acid such as ethyl acrylate, 1,2-propanediol diacrylate,
  • Isoprene, and ethers and esters of allyl or methallyl alcohol such as diallyl phthalate, methallyl methyl fumarate, 1,2,3-tri (allyloxy) propane, diallyl diglycol carbonate and diallyl maleate.
  • allyl or methallyl alcohol such as diallyl phthalate, methallyl methyl fumarate, 1,2,3-tri (allyloxy) propane, diallyl diglycol carbonate and diallyl maleate.
  • Gaseous or solid monomers can also be mixed with these liquid monomers, provided they, such as butadiene, vinyl chloride, vinylnaphthalene, vinylcarbazole and the like, give a liquid mixture with the liquid monomer.
  • the monomer or monomer mixture also optionally serves as the resin component solvent or diluent.
  • This resin ingredient may be a high molecular weight homo- or copolymer which is able to copolymerize with the monomer or monomer mixture.
  • copolymers of styrene and butadiene are also suitable for this purpose.
  • unsaturated polyesters obtained by condensation of dihydric alcohols, such as, for example, ethanediol, 1,2-propanediol, 1,3-propanediol, diethylene glycol, 1-allyl-2,3-hydroxypropanol with an ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid such as maleic acid, fumaric acid and the like.
  • dihydric alcohols such as, for example, ethanediol, 1,2-propanediol, 1,3-propanediol, diethylene glycol, 1-allyl-2,3-hydroxypropanol
  • an ⁇ , ⁇ -ethylenically unsaturated dicarboxylic acid such as maleic acid, fumaric acid and the like.
  • the unsaturated polyesters may for example contain other di- and polybasic carboxylic acids, such as endomethylenetetrahydrophthalic acid, tetrahydrophthalic acid, phthalic acid, succinic acid, adipic acid, propionic acid, benzenetricarboxylic acid, benzene tetracarboxylic acid, or other alcohols such as benzyl alcohol, 1,2-di- ( allyloxy) -3-propanol-glycerol diallyl ether, pentaerythritol, and hydroxycarboxylic acids, such as example 4-hydroxymethylcyclohexanecarboxylic acid.
  • these substances are essentially made US27444 as well as from the DE2046575 and from DE1024654 .
  • DE1067210 and DE1081222 is known, the contents of which are hereby incorporated by reference.
  • epoxy compounds with more than one epoxide compound can also be used as the polymerizable phase.
  • the resin mixture according to the invention contains, for example, monomers selected from the group consisting of methacrylate and derivatives, polyesters and derivatives, epoxide and derivatives, furan and derivatives, phenol and derivatives, acrylate and derivatives, styrene and derivatives, any mixtures of the abovementioned monomers.
  • This particular combination of the constituents of the resin mixture leads to a shaped body which, in addition to a particularly low pore diameter for a particularly fine surface, also has particularly good strength for mold construction, for example for acrylic baths.
  • the resin mixture of the invention contains 1 to 4 weight percent emulsifier or a mixture of emulsifiers. This provides for easier processing of the emulsion resulting from the composition, so that the composition according to the invention can be processed longer and thus the mold for mold making can be filled more easily.
  • 0.05 to 2% by weight of alkyl alcohol ethoxylate may particularly preferably be contained as emulsifier.
  • more preferably 1.5 to 3% by weight of a saturated solution of a block copolymer with basic groups may be present in the resin mixture according to the invention.
  • the resin mixture according to the invention preferably contains 0.01 to 0.5% by weight of accelerator, in particular selected from the group consisting of N, N-dimethylaniline (DMA), N, N-diethylaniline (DEA), N, N-bis (2-hydroxyethyl ) -m-toluidine, N, N-bis- (2-hydroxyethyl) -p-toluidine (HEPT), N, N-dimethyl-p-toluidine (DMPT), N-methyl-N- (2-hydroxyethyl) - p-toluidine (MHPT) or mixtures thereof.
  • accelerator in particular selected from the group consisting of N, N-dimethylaniline (DMA), N, N-diethylaniline (DEA), N, N-bis (2-hydroxyethyl ) -m-toluidine, N, N-bis- (2-hydroxyethyl) -p-toluidine (HEPT), N, N-dimethyl-p-toluid
  • the resin mixture according to the invention preferably contains from 2 to 20% by weight of 2-hydroxyethyl methacrylate (HEMA). It has been found that this constituent in this amount adheres the metal particles particularly well together and leads to a particularly good strength of the molding.
  • HEMA 2-hydroxyethyl methacrylate
  • the resin mixture according to the invention preferably contains 45 to 64% by weight of methyl methacrylate. Irrespective of or in combination therewith, the resin mixture according to the invention preferably contains from 20 to 24% by weight of epoxy methacrylate. Regardless of or in combination therewith, the resin mixture according to the invention preferably contains from 11 to 16% by weight of 2-hydroxymethylmethacrylate. Irrespective of or in combination therewith, the resin mixture according to the invention preferably contains from 4 to 10% by weight of monostyrene.
  • the water component preferably also contains 0.1 to 3% by weight of glycol ethers, derivatives of glycol ethers or mixtures thereof. It has been found that this addition in the water component leads to a particularly stable emulsion of the composition according to the invention.
  • the free radical initiator may be, for example, either a thermally active or a peroxidic radical initiator such as BPO.
  • the metal particles are preferably aluminum particles.
  • the metal particles preferably have an average diameter of 0.1 to 300 .mu.m, in particular in a range of 5 to 100 .mu.m. Below this area usually creates a non-pourable paste. Above this range, there is usually no casting compound, since then the sedimentation becomes too strong.
  • the composition contains predominantly metal particles.
  • the thermal conductivity of the resulting molded body is particularly high.
  • the composition contains more parts by weight of the water component than parts by weight of the resin mixture. This has the consequence that the porosity of the resulting molded body is particularly high.
  • the free radical initiator is added last and the composition is then stirred to an emulsion.
  • the emulsion cures in the mold and can be easily demolded.
  • the composition is deaerated for at least 3 hours, in particular for at least 20 hours. This is done, for example, by standing in the air or alternatively by applying a vacuum.
  • the second step is preferably carried out at most up to 15 minutes after addition of the radical initiator.
  • the demolded casting is postcured to a furnace, at the same time the water is expelled.
  • the temperature is set to not more than 130 ° C in the third step, since otherwise the cured resin can be at least partially decomposed.
  • the temperature in the third step to at least 110 ° C, since the water can be driven out of the resin very efficient.
  • the temperature is preferably maintained for 4 to 20 hours, and in particular at least 8 hours, so that the resulting molded body can harden as completely as possible and the water can be completely expelled.
  • the final curing can preferably be done only thermally.
  • the temperature in step 3 depending on the volume stepwise to, for example, above 100 ° C for at least 1 h, in particular at least 6 h after the start of the pre-curing by the catalyst, so there are no cracks or stresses in the molding.
  • the water is preferably at least partially expelled during the curing of the resin.
  • the object underlying the invention is achieved by a porous, resin-bonded and filled with metal particles molded body, characterized in that it has an average pore diameter in a range of 0.1 to 10 microns.
  • the shaped body according to the invention is produced according to the method according to the invention.
  • the porosity of the shaped body according to the invention is advantageously in a range of 20 to 50%, in particular in a range of 30 to 40%.
  • the porosity, average pore diameter and pore size distribution were measured according to DIN 66139 (draft), DIN 66135 part 1 to 4, DIN ISO 9277 and DIN 66134.
  • Porosity in the sense of the invention is the ratio of void volume to total volume.
  • the average pore diameter is advantageously in a range of 0.1 to 4 microns.
  • less than 10% of the pores have a pore diameter of more than 10 microns.
  • less than 5% of the pores have a pore diameter less than 0.4 ⁇ m.
  • at least 85%, in particular at least 90%, of the pores have a pore diameter of 0.4 to 10 ⁇ m.
  • at least 70% of the pores have a pore diameter of 1 to 2 ⁇ m.
  • the molding according to the invention is, for example, a particularly suitable molding for the thermoforming industry due to the porosity, the high thermal conductivity and temperature resistance and the very smooth surface.
  • this shaped body is very well suited due to the high stability and the very fine surface.
  • the apparent density is, for example, in a range of 0.5 to 1.8 g / cm 3.
  • the purity is, for example, in a range of 1 to 2.3 g / cm 3 .
  • the metal particles are preferably aluminum particles.
  • the metal particles preferably have an average diameter of 0.1 to 300 .mu.m, in particular in a range of 5 to 100 .mu.m. Below this range, the thermal conductivity of the resulting molded body decreases. Above this range, the stability of the resulting molded body seems to decrease.
  • the weight ratio of metal particles to resin is advantageously in a range from 2: 1 to 5: 1, in particular in a range from 3: 1 to 4: 1.
  • the resin is preferably predominantly polymerized methyl acrylate, derivatives and mixtures thereof.
  • the average pore size was 1.6 ⁇ m.
  • the porosity was 35%.
  • the true density was 2 g / cm 3 .
  • the bulk density was 1.4 g / cm 3 .
  • Overall, less than 6% of the pores had a pore diameter of more than 10 microns.
  • Overall, less than 2% of the pores had a pore diameter of less than 0.4 ⁇ m.
  • Overall, more than 90% of the pores had a diameter in a range of 0.4 to 10 microns.
  • methyl methacrylate In 100 cm 3 of methyl methacrylate, 1.6 g of dimethylparatoluidine were introduced, with 100 g of polymethyl methacrylate (bead polymer, grain size about 20 ⁇ ) in which 2 g of benzoyl peroxide were finely divided, mixed and then with 200 cm 3 of a liquid pore-forming agent consisting of 89 cm 3 of water and 11 cm 3 of isopropanol, until emulsified. The molding compound was then polymerized in a mold at 40-50 ° C in 10-15 minutes. A solid polymer was obtained, from which the pore former could be expelled at 50 ° C.
  • methyl methacrylate 20 g of ethylene glycol dimethacrylate and 1.8 g of dimethylparatoluidine 2.5 g of an E-copolymer of 25% vinyl acetate and 75% methyl methacrylate (dispersion polymer) were dissolved.
  • the solution was stirred vigorously with 80 g of polymethacrylate (bead polymer, particle size 0.1 mm) with the addition of 150 cm 3 of water for 15-20 minutes.
  • 2 g of bezoyl peroxide dissolved in 15 cm 3 of methyl methacrylate were added to the finished emulsion and mixed.
  • the finished casting compound was applied to a glass fiber fleece and distributed by pressing and spreading between two films in the web. It was then cured at 50 ° C in 10 - 15 minutes. The result was a glass fiber reinforced plastic plate.
  • the water contained in it evaporated at 25 - 30 ° C in about 24 h.
  • a prepolymer of syrup-like consistency of methyl methacrylate 70 g, 16.5 g of ethylene glycol dimethacrylate, 4.0 g of benzoyl peroxide paste (50%) and 10.0 g of polyvinyl chloride powder were well mixed and stirred with 100 g of water to the emulsion.
  • the casting material was left to vent for some time, then 1.5 g of dimethylparatoluidine were added and smoothed out on a surface (thickness 5 - 10 mm). At 60 ° C, the spread was polymerized in 10-15 minutes. The water was allowed to dry slowly at normal room temperature (20 ° C).
  • the whole was stirred with 150 g of water to the emulsion, after deaeration, 30.0 g of styrene were mixed with 0.8 g of dimethylparatoluidine and cured the casting material after processing at 20 ° C. The water was expelled at 100 ° C.
  • diallyl phthalate 25 g of methyl methacrylate, 2.0 g of benzoyl peroxide and 1.5 g of dimethylparatoluidine and 50.0 g of a precondensate of diallyl phthalate were mixed and stirred with 75.0 g of water to the emulsion.
  • the casting material obtained was poured at 50 ° C in molds, polymerized, the water then expelled at 100 ° C.
  • the resulting moldings have a low strength and easily crumble.
  • the resulting moldings have a low thermal conductivity and are therefore not suitable for rapid production, for example in Vakuumtiefziehvon or sanitary ware.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (10)

  1. Composition de moulage pour la préparation d'un corps moulé poreux lié par de la résine, contenant
    a) de 100 à 200 parties en poids d'un mélange de résines,
    b) de 100 à 200 parties en poids de composant d'eau,
    c) de 80 à 700 parties en poids de particules métalliques, et
    d) de 1 à 15 parties en poids d'amorceur radicalaire.
  2. Composition selon la revendication 1, caractérisée en ce que le mélange de résines contient les composants suivants :
    i) de 30 à 94 % en poids de méthacrylate, de dérivés de méthacrylate, ou de mélanges de ceux-ci ;
    ii) de 5 à 65 % en poids de styrène, de dérivés de styrène, ou de mélanges de ceux-ci,
    iii) 1 à 5 % en poids d'excipients choisis dans le groupe constitué par des émulsifiants, des accélérateurs, et des mélanges de ceux-ci.
  3. Composition selon la revendication 1 ou 2, caractérisée en ce que le mélange de résines contient de 2 à 20 % en poids d'hydroxyéthylméthacrylate.
  4. Composition selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le composant d'eau contient, en plus de l'eau, de 0,1 à 3 % en poids d'éther de glycol, de dérivés d'éther de glycol, ou de mélanges de ceux-ci.
  5. Composition selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les particules métalliques sont des particules d'aluminium.
  6. Composition selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les particules métalliques ont un diamètre moyen de 0,1 à 300 µm, en particulier dans une plage de 5 à 100 µm.
  7. Composition selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la composition contient principalement des particules métalliques.
  8. Composition selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la composition contient plus de parties en poids du composant d'eau que de parties en poids du mélange de résines.
  9. Procédé de préparation d'un corps moulé poreux lié par de la résine, dans lequel :
    a) dans une première étape, la composition selon l'une quelconque des revendications 1 à 8 est agitée pour former une émulsion, et
    b) dans une deuxième étape, cette émulsion est versée dans un moule, où elle prend la forme d'une pièce moulée, et
    c) dans une troisième étape, la pièce moulée pré-durcie est retirée du moule puis chauffée pendant au moins 1 heure à plus de 100°C, de sorte que premièrement le mélange de résines durcit, et deuxièmement l'eau est éliminée pendant le durcissement,
    de sorte qu'un corps moulé poreux lié par la résine et chargé de particules métalliques est formé.
  10. Corps moulé poreux lié par de la résine et chargé de particules métalliques, caractérisé en ce qu'il présente un diamètre moyen de pore dans une plage de 0,1 à 10 µm, comprenant la composition durcie selon l'une quelconque des revendications 1 à 8.
EP11185922.9A 2011-10-20 2011-10-20 Résine à couler contenant une charge métallique pour la fabrication de moulages poreux. Active EP2583995B1 (fr)

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